Lauren's Little Lemon Tree
Riddle: Lauren has a lemon tree. The number of lemons on the tree doubles every week. In 28 weeks, Lauren should expect the tree to be completely covered with fruit. How many weeks will it take for the tree to be half-covered with apples?
Answer: Zero. If I asked you about lemons, the answer would be 27 weeks because the number of lemons on Lauren's tree doubles every week. However, I asked you about APPLES, and they don't grow on lemon trees; therefore, the answer is zero.
Source: https://www.riddles.com/index.php/11324
